| 释义 |
polycrase Min.|ˈpɒlɪkreɪs|
[ad. G. polykras; named by Scheerer, 1844, f. Gr. πολυ-, poly- + κρᾶσις mixture, from its many constituents.]
A shining black mineral, consisting of columbate and titanate of uranium, zirconium, yttrium, and other bases.
1845Amer. Jrnl. Sc. XLIX. 394 Polycrase is near polymignite. 1892Dana Min. (ed. 6) 745 Scandium is prominent in the sprectrum of the American polycrase. |